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在微生物硫酸盐还原过程中Cd-Sch的硫化:Cd的纳米级再分配

Yanping Deng¹, Changdong Ke², Meihui Ren¹

¹School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China.

The Science of the total environment

|June 27, 2024

概括

含有的施韦特曼尼特微生物减少表明,较高的硫酸盐与铁的比率促进硫化物生成,改变矿物阶段并影响的固定. 这影响了无氧环境中的污染物命运.

科学领域:

环境科学环境科学
地质化学地质化学
微生物学微生物学

背景情况:

施瓦特曼尼特 (Sch) 是一种硫酸铁矿物质,在富含铁和硫酸盐的环境中发现.
微生物活动可以改变施瓦特曼尼特,影响共存的污染物分布.
硫酸盐与铁 (S/Fe) 比率对微生物施瓦特曼尼特转化和 (Cd) 命运的影响尚不清楚.

研究的目的:

调查S/Fe摩尔比如何影响微生物介导的施瓦特曼尼特转化.
确定这些转变对的命运和固定的影响.
阐明硫酸盐减少细菌 (SRB) 在这些过程中的作用.

主要方法:

使用Desulfovibrio vulgaris.微生物减少含的施韦特曼尼特.
在不同S/Fe比率下对矿物相变化的分析.
评估与矿物相相关的物种和分布.

主要成果:

增加的S/Fe比率增强了SRB活动,加速了硫化物 (S(-II)) 生产和施瓦特曼尼特的转化.
矿业学从维维亚尼特转向麦卡纳,随着S/Fe比率的上升.
主要存在于可氧化状态,与FeS和含量有很强的相关性.

结论:

S/Fe比率是控制微生物施瓦特曼尼特转化和固定的关键因素.
维亚尼特和FeS矿物的共存有利于在无氧环境中的固定.
这些发现为铁的生物地质化学和自然系统中的命运提供了洞察力.

关键词:

是的组成部分.德苏尔福维布里奥尔加里斯 (Desulfovibrio vulgaris) 是一种常见的矿物转化矿物转化的过程在S/Fe中使用.施瓦特曼尼特 (Schwertmannite) 是一种重型人造石.硫化硫化剂的存在

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The Sulfur Cycle

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